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 ###Instrução: Quantos membros a África tinha no ano em que a Austrália tinha 94615?
 ###Tabelas: CREATE TABLE chronology_of_worldwide_membership (chronology_of_worldwide_membership_id AUTO_INCREMENT PRIMARY KEY, Year INT, Worldwide INT, Africa INT, America INT, Asia INT, Australia INT, Europe INT) CREATE TABLE u.s._nielsen_weekly_ratings (u.s._nielsen_weekly_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode VARCHAR, Rating INT, Share INT, 18–49 (Rating/Share) VARCHAR, Viewers (m) INT) CREATE TABLE high-floor_versions (high-floor_versions_id AUTO_INCREMENT PRIMARY KEY, City VARCHAR, Operator VARCHAR, Type designation VARCHAR, Number of vehicles INT, Width VARCHAR) CREATE TABLE overlap_between_multiple_social_network_services (overlap_between_multiple_social_network_services_id AUTO_INCREMENT PRIMARY KEY, Site VARCHAR, Bebo INT, Facebook INT, Friendster INT, LinkedIn INT, MySpace INT, Ning INT, Orkut INT, Plaxo INT) CREATE TABLE top_50_quarterbacks_in_nfl_history (top_50_quarterbacks_in_nfl_history_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Quarterback VARCHAR, Seasons VARCHAR, Teams VARCHAR, Team Wins INT, Team Losses INT, Career Wins INT, Career Losses INT, Ties INT)  
SELECT Africa FROM chronology_of_worldwide_membership WHERE Australia = 94615